<template>
  <div id="contsainer"></div>
</template>
<script>
export default {
  data() {
    return {
      viewer: null
    }
  },
  mounted() {
    this.initCesium()
    this.addCircleGeometry(this.viewer)
  },
  methods: {
    initCesium() {
      this.viewer = new Cesium.Viewer('contsainer', {
        animation: false,
        baseLayerPicker: false,
        fullscreenButton: false,
        geocoder: false,
        homeButton: false,
        infoBox: false,
        sceneModePicker: false,
        navigationHelpButton: false,
        scene3DOnly: true,
        timeline: false,
        selectionIndicator: false, //是否显示选取指示器组件
        shouldAnimate: false, //自动播放动画控件
        shadows: true, //是否显示光照投射的阴影
        terrainShadows: Cesium.ShadowMode.RECEIVE_ONLY, //地质接收阴影
        sceneMode: Cesium.SceneMode.SCENE3D
      })
      this.viewer._cesiumWidget._creditContainer.style.display = 'none' //	去除版权信息
    },
    addCircleGeometry(viewer) {
      let circle = new Cesium.CircleGeometry({
        center: Cesium.Cartesian3.fromDegrees(0, 0.03883),
        radius: 1000000.0
      })
      let geometry = Cesium.CircleGeometry.createGeometry(circle)

      let boxInstance = new Cesium.GeometryInstance({
        geometry: geometry,
        modelMatrix: Cesium.Matrix4.multiplyByTranslation(
          Cesium.Transforms.eastNorthUpToFixedFrame(Cesium.Cartesian3.fromDegrees(-85.59777, 20.03883)),
          new Cesium.Cartesian3(0.0, 0.0, 10000.0),
          new Cesium.Matrix4()
        ),
        attributes: {
          color: Cesium.ColorGeometryInstanceAttribute.fromColor(Cesium.Color.YELLOW)
        },
        id: 'top'
      })

      let primitive = new Cesium.Primitive({
        geometryInstances: [boxInstance],
        asynchronous: false, //是否采用多线程
        appearance: new Cesium.PerInstanceColorAppearance({
          translucent: false, //半透明
          flat: false //当 true 时，片段着色器中将使用平面阴影，这意味着不考虑光照
        })
      })

      viewer.scene.primitives.add(primitive)
    }
  }
}
</script>
<style scoped>
#contsainer {
  height: 100%;
  width: 100%;
  background-color: red;
}
</style>
